package com.common.util;


import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.context.ApplicationEvent;
import org.springframework.lang.Nullable;
import org.springframework.stereotype.Component;

import java.util.Map;

@Component
public class SpringUtil implements ApplicationContextAware {
    private static final Logger log = LoggerFactory.getLogger(SpringUtil.class);

    private static ApplicationContext context;

    public void setApplicationContext(@Nullable ApplicationContext context) throws BeansException {
        SpringUtil.context = context;
    }

    public static <T> T getBean(Class<T> clazz) {
        if (clazz == null)
            return null;
        return context.getBean(clazz);
    }

    public static <T> T getBean(String beanId) {
        if (beanId == null)
            return null;
        return (T) context.getBean(beanId);
    }

    public static <T> T getBean(String beanName, Class<T> clazz) {
        if (null == beanName || "".equals(beanName.trim()))
            return null;
        if (clazz == null)
            return null;
        return context.getBean(beanName, clazz);
    }

    public static ApplicationContext getContext() {
        if (context == null)
            return null;
        return context;
    }

    public static void publishEvent(ApplicationEvent event) {
        if (context == null)
            return;
        try {
            context.publishEvent(event);
        } catch (Exception ex) {
            log.error(ex.getMessage());
        }
    }

    public   <T> Map<String, T> getBeansOfType(Class<T> clazz) {
        return context.getBeansOfType(clazz);
    }
}
